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Elementary school science fair projects

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There are so many great elementary school science fair projects out there. You can find elementary school science fair projects on subjects that run from geology to chemistry to astronomy, and more. Just be sure that when picking an elementary school science fair project that it is one that you will enjoy doing. Try to think of one that is on a topic you are already interested in, and then take it one step further. I hope that these three ideas of elementary school science fair projects will give you a good start as to thinking about what you want to do for your own elementary school science fair project.

Elementary school science fair project on air pressure – THE MAGIC CAN

Take a coffee can and poke three small holes in the bottom of the can and one small hole in the lid. Fill the can half-way full of water and place the lid back on. Press down on the lid while covering the hole in it. Water will stream out of the holes that you punched in the bottom of the can. Now remove your hand from the hole in the lid. What happens? The water stops flowing.

Why is this? You filled the can only half full with water and left the other half empty, right? Well, sort of. The other half was actually filled with air. When you pushed down on the lid, you pushed the air down into the water which pushed the water out of the can. The pressure on the lid exerted pressure on the air which exerted pressure on the water. Once you stop pressing the lid and uncover the lid’s hole, then the pressure of the air on the outside of the can actually holds the water up from the bottom!

A very classic elementary school fair project – BUILD YOUR OWN VOLCANO

Supplies:
· 6 cups flour
· 2 cups salt
· 4 tablespoons cooking oil
· 2 tablespoons baking soda
· warm water
· vinegar
· food coloring
· dishwashing detergent
· plastic soda bottle
· baking dish or pan

Mix the flour, salt, cooking oil, and water until the mixture is smooth and firm (add more water if it is to thick).

Place the plastic soda bottle in the middle of your baking pan and build the dough you just made around it into a volcano shape. Be sure that you do not cover the hole or drop dough inside (it is a good idea to leave the lid on the bottle until you are finished building up your dough.

Now fill up the bottle most of the way with warm water and add a bit of red food coloring (be sure to leave some space at the top). Add 6 drops of detergent to the bottle. Now add the baking soda. Next is the fun part – slowly add vinegar into the bottle. You are sure to have an eruption, so watch out!

What happened? The baking soda and the vinegar had a chemical reaction in which carbon dioxide gas was produced (this gas is present in real volcanoes!). As this gas was produced, pressure built up inside the plastic bottle until the gas bubbled (with help from the detergent) out of the volcano.

Elementary school science fair project – MAKE INVISIBLE INK

Supplies:
· baking soda
· water
· paper
· light bulb (or other heat source)
· swab or paintbrush or toothpick
· measuring cup
· grape juice

Mix equal parts baking soda and water. Take paintbrush, cotton swab, or toothpick and dip it into your solution and then write a message onto a piece of paper (be sure to keep dipping your utensil as needed). Once the ink is dry, you can pass off your secret message to another person and tell them to hold it up to a heat source (like the light bulb) to read it. Where you wrote your words, the paper will turn brown.

Instead of using the heat source, you could, instead, paint over the paper with the grape juice. See what color the message appears in! Baking soda and grape juice had an acid-base reaction.

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High school science fair projects
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Science fair topics
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